Senior AI Engineer

Senior AI Engineer London | Competitive Salary up to £120,000 + Benefits This is an exceptional opportunity to join a newly established AI innovation team focused on shaping the future of AI-powered content experiences. You will work on cutting-edge generative AI applications, taking ideas from experimentation through to production and helping deliver impactful products used at scale. The Company They are a globally recognised organisation that delivers trusted information, insights, and services to a diverse international audience. Their work is built on a commitment to quality, innovation, and evidence-based thinking. As they continue to invest in AI capabilities, they are creating a dedicated team to explore how emerging technologies can transform customer experiences and product offerings. The Role You will play a key role in designing, building, and deploying advanced AI systems while collaborating closely with product, engineering, and design teams. Responsibilities include:

• Fine-tuning large language models to support specific content styles and use cases.
• Designing, curating, and managing datasets for model training and evaluation.
• Building and optimising Retrieval-Augmented Generation (RAG) pipelines.
• Developing evaluation frameworks and quality metrics for AI models.
• Implementing human-in-the-loop feedback processes to improve model performance.
• Prototyping speech and audio-based AI applications.
• Supporting experimentation across generative AI, personalisation, summarisation, and multimodal technologies.
• Working with stakeholders to define success criteria and ensure AI solutions deliver measurable value. Your Skills & Experience
• Strong commercial experience building LLM, NLP, or generative AI applications.
• Hands-on experience with platforms such as OpenAI, Claude, Cohere, Gemini, Mistral, or Hugging Face.
• Expertise in Python and modern AI frameworks, including LangChain and Hugging Face Transformers.
• Experience with model fine-tuning techniques and prompt optimisation.
• Understanding of RLHF, preference modelling, and model evaluation methodologies.
• Familiarity with data tooling and model experimentation platforms.
• Exposure to speech technologies, including speech-to-text and text-to-speech solutions.
• Excellent communication skills and the ability to collaborate across technical and non-technical teams. What They Offer
• Competitive salary and comprehensive benefits package.
• Opportunity to work on innovative AI products with high visibility and real-world impact.
• Access to cutting-edge AI technologies and experimentation environments.
• Collaborative, cross-functional working culture.
• Clear opportunities for professional growth and career progression within an expanding AI function. How to Apply If you are an experienced AI Engineer looking to work on large-scale generative AI solutions in London, apply today to learn more about this exciting opportunity.